fix: fix segfault in list_domain

[forsaken628]

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Summary

• fixes: bug: segfault in k_way_merge_sort_partition #16923

Tests

• Unit Test
• Logic Test
• Benchmark Test
• No Test - Explain why

Type of change

• Bug Fix (non-breaking change which fixes an issue)
• New Feature (non-breaking change which adds functionality)
• Breaking Change (fix or feature that could cause existing functionality not to work as expected)
• Documentation Update
• Refactoring
• Performance Improvement
• Other (please describe):

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This change is 

[forsaken628]

Here we found the bug and constructed the reproduce input using cargo-fuzz, which saves a lot of time compared to constructing the input by hand.

However, fuzz has some limitations. It consumes a lot of memory at compile time, so it should only be used for small core code that doesn't have too many dependencies.

[TCeason]

wait #16980